As is known to us all English books of this kind well in middle schools.A. sellB. sells

问题补充：

As is known to us all, English books of this kind well in middle schools.

A. sell

B. sells

C. is sold

D. are sold

答案：

(答案→)A. sell

B. sells

C. is sold

D. are sold

解析：考查动词主动表示被动和主谓一致的用法：句意：众所周知，这种英语书在中学很畅销。sell这个词可以用主动表示被动，表示书的特点，属性，sell well意思是“畅销”。主语是English books of this kind，谓语是复数，如果是this kind of English books，谓语就是单数，选A。